feat: upgrade react to v18

[huniafatima-99]

Description

This PR upgrades react from v17 to v18.

Issue link

#753

[brian-smith-tcril]

Thanks for opening this!

Looks like CI is failing on lint at the moment. Could you run lint:fix?

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 3 lines in your changes missing coverage. Please review.

Project coverage is 93.15%. Comparing base (ff72dab) to head (3379141).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
src/index.jsx	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #759      +/-   ##
==========================================
- Coverage   93.17%   93.15%   -0.03%     
==========================================
  Files         161      161              
  Lines        3401     3402       +1     
  Branches      919      923       +4     
==========================================
  Hits         3169     3169              
  Misses        215      215              
- Partials       17       18       +1     

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[open-craft-grove]

Sandbox deployment successful 🚀
🎓 LMS
📝 Studio
ℹ️ Grove Config, Tutor Config, Tutor Requirements

[brian-smith-tcril]

Overall this is looking great! I left a couple comments about changes to the tests, but once those are addressed this should be good to merge!